Steel bar automatic cutting flat head thread machining equipment

Abstract

The invention relates to the technical field of rebar head machining, in particular to rebar automatic cutting flat head thread machining equipment. The automatic cutting flat head thread machining equipment for the reinforcing steel bar comprises a rack, a cutting head capable of moving front and back is installed on the rack, and a clamping head used for clamping the reinforcing steel bar is installed in the direction of the extension line of the central axis of the cutting head. According to the automatic cutting flat-head thread machining equipment for the reinforcing steel bars, stable supporting is provided through the rack, the cutting head can move front and back on the rack for machining, and the clamping head arranged in the direction of the extension line of the central axis of the cutting head is responsible for fixing the reinforcing steel bars; the first air cylinder installed below the workbench drives the first rack on the telescopic rod to move, power is transmitted to the second rack below the cutting head through the gear set, and therefore the front-back moving stroke of the cutting head is accurately controlled, and automatic cutting and thread machining of the end face of the reinforcing steel bar are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar head processing, and in particular to an automatic cutting and flat-head threading processing equipment for steel bars. Background Art

[0002] At present, in domestic construction projects, the processing of the ends of steel bars still generally adopts the step-by-step processing method of manual operation on a lathe for cutting and threading. According to the statistical data of the China Construction Industry Association, the processing efficiency of this traditional process is only 12 - 15 pieces per hour, and the thread accuracy is greatly affected by the technical level of the operators, and the qualified rate is generally lower than 85%. At the same time, limited by the feeding problem, the positioning of the steel bar material is inaccurate and the feeding stability is poor, resulting in low efficiency of cutting the flat head of the steel bar.

[0003] In view of the above defects, the inventor actively conducts research and innovation in order to create an automatic cutting and flat-head threading processing equipment for steel bars, making it more valuable in industrial applications. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide an automatic cutting and flat-head threading processing equipment for steel bars.

[0005] An automatic cutting and flat-head threading processing equipment for steel bars of the present invention includes a frame. A cutting head that can move back and forth is installed on the frame, and a clamping head for clamping the steel bar is installed in the direction of the extension line of the central axis of the cutting head. A first cylinder is installed under the workbench of the frame. A first rack is fixed on the telescopic rod of the first cylinder. The first rack drives a gear set to rotate, and the gear set drives the cutting head to move back and forth through a second rack fixed under the cutting head.

[0006] This automatic cutting and flat-head threading processing equipment for steel bars provides stable support through the frame. The cutting head can move back and forth on the frame for processing, and the clamping head arranged in the direction of the extension line of its central axis is responsible for fixing the steel bar. The first cylinder installed under the workbench drives the first rack on the telescopic rod, and transmits the power to the second rack under the cutting head through the gear set, thereby accurately controlling the forward and backward movement stroke of the cutting head, and realizing the automatic cutting of the steel bar end face and threading processing.

[0007] Further, there are two parallel guide rods above the workbench of the frame, and sliding seats sleeved on the guide rods are arranged on both sides of the cutting head.

[0008] The cutting head forms a precise sliding fit with the two parallel guide rods above the workbench of the frame through the sliding seats arranged on both sides, which is convenient for the cutting head to translate and process the steel bar head.

[0009] Further, the gear set includes a gear rack fixedly installed on the workbench of the frame. A shaft is installed inside the gear rack. A first gear and a second gear are fixedly installed on the shaft through pins. The first gear meshes with the first rack, and the second gear meshes with the second rack.

[0010] The gear transmission system uses the gear rack as the core support structure. The gear rack is rigidly fixed on the workbench of the frame through high-strength bolts. The first gear and the second gear symmetrically fixed on the shaft through taper pins form a two-stage reduction transmission pair. Among them, the first gear meshes with the first rack driven by the first cylinder to realize the linear-rotary motion conversion, and the second gear meshes with the second rack under the cutting head to complete the reverse transmission of the rotary-linear motion.

[0011] Further, a support wheel is movably installed at the bottom of the gear rack through a shaft, and the support wheel contacts the chute at the bottom of the first rack.

[0012] The bottom of the gear rack adopts a shafting floating support structure. The support wheel is installed through a precision bearing. The support wheel forms a rolling contact with the V-shaped chute at the bottom of the first rack driven by the first cylinder to ensure a stable contact state is maintained during the movement of the rack.

[0013] Further, a second cylinder is movably installed at the bottom of the frame through a cylinder seat. The top end of the second cylinder is movably connected to a connecting plate through a shaft. The connecting plate is fixedly connected to a rotating shaft. The rotating shaft is movably installed on the workbench of the frame through a bearing. A retaining plate is fixed on the rotating shaft, and the retaining plate is located at the front end of the feeding port of the cutting head in the vertical state.

[0014] The second cylinder is installed at the bottom of the frame through a cylinder seat, and the end of its piston rod is movably connected to the connecting plate through a pin shaft. The connecting plate is rigidly fixed to the rotating shaft. The rotating shaft is supported on the workbench of the frame through a bearing and can rotate flexibly. The retaining plate welded on the rotating shaft is used as the core material blocking component. When the cylinder acts, it drives the retaining plate to make a rotational motion and accurately blocks in front of the feeding port of the cutting head in the vertical working position to form a reliable material positioning barrier.

[0015] Further, the clamping head includes a third cylinder fixed on the frame. A third rack is fixed on the telescopic rod of the third cylinder. The third rack meshes with a third gear. The third gear is installed on a bidirectional screw rod. Two mirror-image clamping blocks are sleeved on the bidirectional screw rod. A guide post for guiding is installed between the clamping blocks. The bidirectional screw rod is installed on a vertical plate through a bearing, and the guide post is fixed between the two vertical plates.

[0016] The clamping head of the automatic steel bar cutting equipment adopts a pneumatic-mechanical linkage mechanism. The third cylinder is fixed on the frame, and its telescopic rod drives the third rack to move linearly. The rack meshes with the third gear to drive the bidirectional screw to rotate. Two mirror-symmetrical clamping blocks are installed on the bidirectional screw through thread fit and move synchronously in opposite directions under the guiding action of the guide posts. The whole set of mechanism is supported and fixed by the vertical plate, and both ends of the bidirectional screw are supported by bearings to ensure smooth rotation.

[0017] Furthermore, a feeding limit wheel is horizontally installed at the front end of the vertical plate through an adapter plate, and the middle part of the feeding limit wheel is concave inward.

[0018] A special feeding limit wheel is horizontally installed at the front end of the vertical plate. The limit wheel adopts a special contour structure with a concave middle part, which can effectively guide the steel bar to be accurately positioned.

[0019] Furthermore, two knife-opening bars parallel to the guide rod are fixed on the sliding seat. The front width of the knife-opening bar is smaller than the rear width. Two groups of fixed seats are installed on one side of the guide rod, and each group of fixed seats is equipped with a limit bearing that can be moved back and forth. The mounting shaft of the limit bearing passes through the fixed seat, and a spring is sleeved on the mounting shaft. The spring can push out the limit bearing. The tail end of the mounting shaft is open, and a guide wheel is installed through the shaft at the open tail end. The knife-opening bar is inserted into the gap between the inner side of the guide wheel and the fixed seat, and the limit bearing can contact the tool rest adjusting disc at the end of the cutting head.

[0020] Two gradually deformed knife-opening bars with a narrow front and a wide rear are installed in parallel on the sliding seat. Two groups of fixed seats are arranged on one side of the guide rod, and each group of fixed seats supports the limit bearing through a mounting shaft pre-pressed by a spring to form an elastic floating structure. The end of the mounting shaft is designed with an opening and is equipped with a guide wheel, so that the knife-opening bar can be accurately embedded into the guiding gap between the guide wheel and the fixed seat. When the tool rest adjusting disc of the cutting head moves, the automatic tensioning and position calibration of the tool are realized through the contact with the limit bearing. This mechanism effectively ensures the stability and adjustment accuracy of the tool during the cutting process.

[0021] With the above solutions, the present invention has at least the following advantages: Adopting a pneumatically driven bidirectional clamping mechanism, the synchronous opening and closing of the clamping blocks are realized by the third cylinder linking the bidirectional screw. The rapid clamping and release of the steel bar can be completed by a single operation, and the efficiency is improved compared with the traditional bolt fastening method.

[0022] The concave design in the middle of the feeding limit wheel, combined with the guide post guiding system, forms a V-shaped positioning channel.

[0023] The elastic tensioning mechanism ensures that the tool always maintains accuracy during the cutting process through the dynamic contact between the limit bearing and the tool rest adjusting disc (30), combined with the pre-pressure compensation of the spring.

[0024] The wedge-shaped fit design of the guide wheel and the knife-opening bar automatically eliminates the transmission gap during rapid tool change. The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and implement it according to the content of the specification, the following will describe in detail the preferred embodiments of the present invention in conjunction with the accompanying drawings. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show a certain embodiment of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is of the present invention Figure 1 schematic diagram of another perspective Figure 1 ; Figure 3 is of the present invention Figure 2 schematic diagram of a partial enlarged view; Figure 4 is of the present invention Figure 1 schematic diagram of another perspective Figure 2 ; Figure 5 is a schematic structural diagram of the movement of the baffle of the present invention; Figure 6 is of the present invention Figure 5 schematic diagram of another perspective; Figure 7 is of the present invention Figure 4 schematic diagram of a partial enlarged view; Figure 8 is of the present invention Figure 1 schematic diagram of a partial enlarged view; Figure 9 is a cross-sectional view of the related structure of the fixed seat of the present invention.

[0027] In the figure, 1 is a frame, 2 is a cutting head, 3 is a clamping head, 4 is a first cylinder, 5 is a first rack, 6 is, 7 is a guide rod, 8 is a sliding seat, 9 is a gear rack, 10 is a first gear, 11 is a second gear, 12 is a support wheel, 13 is a second cylinder, 14 is a connecting plate, 15 is a rotating shaft, 16 is a baffle, 17 is a third cylinder, 18 is a third rack, 19 is a third gear, 20 is a bidirectional screw, 21 is a guide post, 22 is a vertical plate, 23 is a feeding limit wheel, 24 is a tool holder adjusting plate, 25 is a fixed seat, 26 is a limit bearing, 27 is a mounting shaft, 28 is a spring, 29 is a guide wheel, 30 is a tool holder adjusting disc, 31 is a bidirectional screw. Detailed Description of the Preferred Embodiments

[0028] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] See Figure 1 and Figure 2 As shown in the figure, the automatic cutting and flat - end threading processing equipment for steel bars adopts a modular mechanical drive system, realizes automatic processing through precise pneumatic - gear compound drive. The main body of the equipment is supported by a rigid frame 1. The cutting head 2 performs precise linear motion along the axis of the steel bar, forming a stable processing space with the clamping head 3 at the fixed end. The power system uses the first cylinder 4 as the core drive source. The first rack 5 connected to the end of its telescopic rod converts linear motion into rotational motion of the gear set, and then the second rack 6 converts the rotational motion into precise linear feed of the cutting head 2 for the second time. This design realizes the two - stage conversion of power transmission, not only ensures the stability of cutting feed, but also effectively filters the vibration fluctuations of the pneumatic system through the characteristics of mechanical transmission itself. The use of both pneumatic and gear transmission takes into account both the power response speed and the motion accuracy; the modular layout makes maintenance more convenient; the rigid structure design ensures the equipment stability during heavy - duty cutting; the linear motion mechanism eliminates the cumulative error of traditional rotary feed.

[0030] See Figure 1 As shown in the figure, two high - precision guide rods 7 are arranged in parallel above the workbench of the frame 1. The cutting head 2 forms a sliding fit with the guide rods through the sliding seats 8 symmetrically arranged on both sides. This double - rail guiding structure enables the cutting head 2 to maintain a stable linear trajectory during reciprocating motion.

[0031] See Figure 3 As shown in the figure, the gear rack 9 is fixed to the workbench of the frame 1 as the core transmission component. The first gear 10 and the second gear 11 are rigidly installed on the transmission shaft supported by bearings inside by pin positioning. When the first cylinder 4 drives the first rack 5 to move linearly, the first gear 10 meshed with it converts the linear motion into rotational motion, and drives the second rack 6 through the coaxially connected second gear 11 to achieve reverse linear output.

[0032] See Figure 3 As shown in the figure, a rotatable support wheel 12 is innovatively configured at the bottom of the gear rack 9 to form a movable support structure through shaft connection. The support wheel 12 forms a rolling fit with the preset chute at the bottom of the first rack 5. When the first rack 5 performs reciprocating linear motion, the support wheel 12 rolls smoothly along the chute, not only bearing the gravity load of the rack system, but also effectively reducing the motion friction resistance.

[0033] See Figures 4 - 6The second cylinder 13 is hinged to the bottom of the frame 1 through a cylinder seat. The top end of its piston rod is connected to the connecting plate 14 through a movable shaft. The connecting plate 14 drives the rotating shaft 15 passing through the workbench to swing in a sector shape, and finally drives the baffle 16 fixed on the rotating shaft to realize the opening and closing action. The baffle 16 plays a role in limiting the position of the end of the steel bar. When the steel bar is placed in this device, the end of the steel bar contacts the baffle 16. At this time, it is the position for placing and processing the steel bar. The steel bar is clamped by the clamping head 3 at the tail end to complete the processing positioning. Subsequently, the baffle 16 moves away from the cutting head 2 to facilitate the cutting head 2 to move deeper to process the head of the steel bar.

[0034] See Figure 4 and Figure 7 The third cylinder 17 drives the third rack 18 to move linearly. The linear motion is converted into the rotational motion of the bidirectional screw 31 through the third gear 19, driving the mirror-arranged clamping blocks 21 to move synchronously and oppositely along the guide posts 21, and the gear-rack transmission realizes the efficient conversion of pneumatic power; the structure of the bidirectional screw 31 ensures that the displacements of the two clamping blocks 20 are symmetric and accurate; the guide post 21 - vertical plate 22 framework eliminates the interference of lateral forces; the bidirectional screw 31 supported by bearings greatly reduces the friction loss; the clamping and positioning accuracy of sub-millimeter level is achieved through mechanical transmission, which is especially suitable for the flexible fixture requirements in precision machining.

[0035] See Figure 7 The adapter plate horizontally installs the feeding limit wheel 23 with a concave middle part at the front end of the vertical plate 22, forming a material guiding channel with three-point positioning, and the concave wheel rim structure automatically corrects the deviation of the material.

[0036] See Figure 8 and Figure 9, the purpose of adjusting the feed work of the cutting head 2 is achieved through the synergistic effect of the wedge-shaped tool opening strip and the spring pre-tightening mechanism. The slide base 8 serves as the basic load-bearing unit. The two gradually varying-width tool opening strips 24 installed in parallel on it form a tension adjustment track. The front and rear double fixed seat groups 25 configured on the guide rod 7 form the adjustment of the working length of the cutting head 2. The limit bearings 26 assembled in each fixed seat generate continuous pressure through the pre-tightening of the spring 28. When the tool rest adjustment disc 30 contacts the limit bearing, at this time the limit bearing 26 is located at the inner end. Using the limit main shaft 26 to press the tool rest adjustment disc 30 to move backward, the cutting tool inside the cutting head 2 is in an open state. This state is a function inherent to the cutting head 2, facilitating the insertion of the end of the steel bar to be cut. Subsequently, the cutting head 2 continues to feed. The wide part at the rear end of the tool opening strip 24 squeezes the guide wheel 29 to drive the limit bearing 26 to move outward. Subsequently, the tool rest adjustment disc 30 disengages from the limit bearing 26. At this time, the cutting tool inside the cutting head 2 bites the head of the steel bar and then rotates to perform cutting and threading on the end of the steel bar. When the cutting head 2 continues to move forward, the tool rest adjustment disc 30 at its end contacts the limit bearing 26 at the front end. Using the limit bearing 26 to push the tool rest adjustment disc 30 backward, the cutting tool inside the cutting head 2 disengages from the end of the processed steel bar. At this time, the steel bar processing is completed. The cutting head 2 is reset under the drive of the first cylinder 4. The guide wheel 29 connected to the limit bearing 26 at the rear end moves the front end of the tool opening strip 24, and the limit bearing 26 is reset. At this time, the limit bearing 26 is located at the front end of the tool rest adjustment disc 30.

[0037] By operating in this cycle, continuous processing of steel bars can be achieved.

[0038] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change; Second: In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above is only the preferred embodiment of the present invention and is not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An automatic cutting and flat-head threading processing equipment for steel bars, including a frame (1), characterized in that: A cutting head (2) that can move back and forth is installed on a frame (1), and a clamping head (3) for clamping steel bars is installed in the extending direction of the central axis of the cutting head (2). A first cylinder (4) is installed below the workbench of the frame (1). A first rack (5) is fixed on the telescopic rod of the first cylinder (4). The first rack (5) drives a gear set to rotate, and the gear set drives the cutting head (2) to move back and forth through a second rack (6) fixed below the cutting head (2).

2. The automatic steel bar cutting and flat-end threading processing equipment according to claim 1, characterized in that: There are two parallel guide rods (7) above the workbench of the frame (1), and sliding seats (8) sleeved on the guide rods (7) are arranged on both sides of the cutting head (2).

3. The automatic steel bar cutting and flat-end threading processing equipment according to claim 1, characterized in that: The gear set includes a gear rack (9) fixedly installed on the workbench of the frame (1). A shaft is installed inside the gear rack (9), and a first gear (10) and a second gear (11) are fixedly installed on the shaft through pins. The first gear (10) meshes with the first rack (5), and the second gear (11) meshes with the second rack (6).

4. The automatic steel bar cutting and flat head threading processing equipment according to claim 3, characterized in that: A support wheel (12) is movably installed at the bottom of the gear rack (9) through a shaft, and the support wheel (12) contacts the chute at the bottom of the first rack (5).

5. The automatic steel bar cutting and flat-head thread processing equipment according to claim 1, wherein: A second cylinder (13) is movably installed at the bottom of the frame (1) through a cylinder seat. The top end of the second cylinder (13) is movably connected to a connecting plate (14) through a shaft. The connecting plate (14) is fixedly connected to a rotating shaft (15). The rotating shaft (15) is movably installed on the workbench of the frame (1) through a bearing. A stop piece (16) is fixed on the rotating shaft (15), and the stop piece (16) is located at the front end of the feeding port of the cutting head (2) in the vertical state.

6. The automatic steel bar cutting and flat-end threading processing equipment according to claim 1, characterized in that: The clamping head (3) includes a third cylinder (17) fixed on the frame (1). A third rack (18) is fixed on the telescopic rod of the third cylinder (17). The third rack (18) meshes with a third gear (19). The third gear (19) is installed on a bidirectional screw rod (31). Two mirror-image clamping blocks (20) are sleeved on the bidirectional screw rod (31). A guide post (21) for guiding is installed between the clamping blocks (20). The bidirectional screw rod (31) is installed on a vertical plate (22) through a bearing, and the guide post (21) is fixed between the two vertical plates (22).

7. An automatic steel bar cutting and flat-end threading processing device according to claim 6, characterized in that: A feeding limit wheel (23) is horizontally installed at the front end of the vertical plate (22) through an adapter plate, and the middle part of the feeding limit wheel (23) is concave inward.

8. The automatic steel bar cutting and flat-end threading processing equipment according to claim 2, characterized in that: Two knife-opening bars (24) parallel to the guide rod (7) are fixed on the sliding seat (8). The width of the front end of the knife-opening bar (24) is smaller than that of the rear end. Two groups of front and rear fixed seats (25) are installed on one-sided guide rod (7). Each group of fixed seats (25) is provided with a limit bearing (26) that can be moved back and forth. The mounting shaft (27) of the limit bearing (26) passes through the fixed seat (25). A spring (28) is sleeved on the mounting shaft (27). The spring (28) can push out the limit bearing (26). The tail end of the mounting shaft (27) is in an open shape, and a guide wheel (29) is installed at the open tail end through a shaft. The knife-opening bar (24) is inserted into the gap between the inner side of the guide wheel (29) and the fixed seat (25), and the limit bearing (26) can contact the tool rest adjusting disc (30) at the end of the cutting head (2).

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